Tullimonstrum gregarium, Tully Monster with Eye Bar (Pit 11) Marine Fossils made up of 90% quartz

made up of 90% quartz and 10% morganite

these phantoms are chlorite

The stone resembles ordinary limestone but when wet or polished

but are still more rare in comparison with many other species in the ammonite families

stoneware and other carvings for centuries

Tullimonstrum gregarium, Tully Monster with Eye Bar (Pit 11) Marine Fossils made up of 90% quartzTullimonstrum gregarium, popularly known as The Tully Monster, is the Illinois State Fossil & is perhaps one of the most mysterious fossils ever unearthed Age of the Tully Monster During the Pennsylvanian Period (roughly 307 million years ago), the land that is now Illinois lay near Earth's equator. Dense swamps, forested with primitive plants, covered much of western and central Illinois. In shallow seas nearby, the Tully monster swam along with